Propulsion of vessels.



J. E. THORNYOROFT. PROPULSION 0F VESSEL-S. APPLIGATIOH FILED MAY 8, 1911.

Patented Feb. 18, 1913 -s SHBETSSHEET 1.

J. E; THORNYGROFT. I PROPULSION .OF VESSELS. ---*"APP LI0AT10N FILED MAY 8, 191 1.

Patented Feb. 18;1-913.

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J. B. THORNYGROFT. PROPULSION 0F VESSELSV APPLICATION FILED MAY 8, 1911. 1,053,243.

a SHEETS-SHEET s.

Patented Feb. 18, 1913.

- J B. THORNYOROFT. PROPULSI F VBSSELS. APPLICATION D MAY 8, 1911.

Patented Feb..1 8, 1913.

SHEET 4.

8 SHEETS- J. E. THORNYCROPT.

Patented Feb.18,1913

illl'rl "QZ/LWMMA c.5 41 @M/wp wmw kt 5 f m M M B A. H 1 L A M 1 s T 1 E f 1 .IM w 1 w 8 J. E. THORNYGROFT. PROPULSION OF VBSSELS.

APPLICATION FILED MAY 8, 1911.

Patented Feb. 18, 1913.

6 SHEETS-SHEET 6.

J; E. THORNYORDFT,

- PROPULSION OF VESSELS. APPLIOAIION FILED MAY 8, 1911'.

1,053,24e3 Patented Feb. '18, 1913.

8 SHEETSfSHEBT 'J. E. THORNYG ROFT PROPULSION OF v sssE'Ls. APPLICATION FILED MAY 8, 1911.

' Patented Feb. 18, 1913 8 SHEETS-SHBET 8.

JOHN EDWARD 'rHon'nYcRorT, or WOOLSTON, ENGLAND.

PROPULSION 0F VESSELS.

mamas.

Specification of Letters Patent.

Patented Feb. 18, 11913.

Application filed May 8, 1911. Serial No. 625,377.

the Propulsion of Vessels, of which the following is a specification.

This invention relates to the propulsion of vessels, such as high speed warships, which at times require the development of very considerable power but frequently cruise at low speeds when the .poWer required is only a small fraction of the maximum that must be provided for.

The primary object of the invention is to provide for this purpose improved installations comprising turbines and internal combustion engines, with-means for bringing the said turbines and internal combus- *tion engines into use alternatively.

With this and other objects in View, the invention consists in the arrangements and combinations of parts hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a side elevation, Fig. 2 a plan and Fig. 3 a sectional elevation, to a larger scale, of part of Fig; 1, illustrative of one arrangement. according to'the invention. Fig. 4 a plan of a modified arrangement. Fig. 5 is a sectional plan drawn to a larger scale, of part of the arrangement shown in Fig. 4. Figs. 6 and 7 are views corresponding respectively to Figs. 4 and of a further modified arrangement. Fig. 8 is a sectional elcvation of a still further modification.

Thearrangemeut shown in Figs. 1-, 2 and 3 isassumed to me for a torpedo boat dcstroyer requiring say 15000 H. P. when driven at full speed but approximately only 1200 H. P. to obtain a cruising speed of say 15 knots. a, a represent .two propeller shafts each provided with a turbine 7) of 7500 H. P. so that when used togetl'ler they aggregate H3000 H. P. for full speed propulsion. 0, c represent oil engiiiies. which may be reversible, of say the Diesel typej each of 600 H. P. so that when used together in lieu of the turbines the required cruising speed can be obtained. The oil engints-are assumed to he of two stroke cycle typ (Z being the air pumps therefor. llaeh engine a is disposed forward of the turbine Z: and

its shaft e is capable'of being, through speed reducing and clutch gear, coupled to and uncoupled from the corresponding propeller shaft whereon is secured the rotor of the turbine. As shown more particularly in Fig. 3, the shaft is provided with a pinion f, preferably formed with double helical teeth, engaging a similarly toothed wheel 9 on a short shaft (1 This shaft a is provided with a. friction clutch element i1v adapted to be expanded by axial movement of a clutch sleeve 7' operated through a hand wheel 70, screw m, nut n and lever connections 0. The companion clutch member ;0 is secured directly upoh the corresponding propeller shaft a.- The arrangement is such that when it is desired to cruise, the clutch of each shaft a is operated to connect the oil engines 0 to the said shafts and cause them to drive the latter, the turbines Z) bein connected, if desired, to condensers q. Vhen the turbines are to be used, the clutches are operated to disconnect the oil engines from the shafts a.

The use of oil engines is advantageous in permitting the economical employment ot oil fired steam generators which may be of a capacity to supply the turbines as well as the auxiliaries of the vessel. The turbines can be rotated by the internal combustion engine or engines during warming up of the former, thereby effecting a saving of time at starting and enabling the-warming up to be done more satisfactorily.

. In the modified arrangement shown in' Figs. i and 5. the whole of the power required for cruising purposes is derived from a single internal combustion engine 0 arranged forward of the turbines b, b and adapted to be geared to both of the propeller shafts. the pinion f on the engine shaft 6 directly meshing with the wheel g pertaining to the clutch of one of the propeller shafts a and indirectlv driving the wheel 9' pertaining to the clutch ofthe other propeller shaft 0 through an intermediate wheel 7.

The arrangement according to Figs. 6 and 7 differs from the arrangement just described in that the oil engine 0 is disposed aft of the turbines Z). Z). and the clutches are ar' ranged on the propeller shafts a.

Althou h friction clutches have been speciiically illustrated in the foregoing figures other forms of clutch may be employed,

Fig. 8 illustrating elements h p of an elecsuitable type.

propeller shafts and adapted to placeeach propeller shaft independently in and out of riving connection with its companion gear wheel.

2. In a vessel, propeller shafts, a turbine on each shaft, an internal combustion en'- gine of a power less than the total power of the turbines and having a shaft parallel to but out of alinement with the propeller shafts, a gear wheel on the engine shaft, a

.larger gear wheel in alinement with each propeller shaft and adapted to transmit the power of the engine to the propeller shafts with a reduction in speed, a clutch member rotatable with each such larger gear wheel, and companion clutch members severally rotatable with the propeller shafts and adapted to place each propeller shaft independently in and out of driving connection with its companion gear whee 3. In a vessel, twin propeller shafts, a turbine on each shaft, an internal combns' tion engine of a power less than the total power of the turbines arranged with its shaft parallel to but out of alinement with the propeller shafts, agear wheel on the engine shaft, a larger gear wheel in alinement with each propeller shaft, one such gear wheel being in direct mesh with the engine gear wheel, a reversing gear wheel between the latter and the gear wheel associated with the other propeller shaft, clutch members severally rotatable with the larger g ar wheels and companion clutch members severally rotatable wlth the propeller shafts and adapted, to place each propeller shaft independently in and out of driving connection with its companion gear Wheel.

4. In a vessel, twin propeller shafts, a turbine on each shaft, an internal combustion engine of a power less than the total power of the turbines, arranged with its shaft parallel to but out of alinement with the propeller shafts, a combined toothed gear wheel and clutch member loosely mounted on each propeller shaft, a toothed pinion on the engine shaft directly engaging one of said toothed wheels, an intermediate pinion engaging the engine shaft'pinion and the other toothed wheel, and clutch members rotating with but axially movable along the propeller shafts adapted to be operated independently to engage the said combined gear Wheel and clutch members.

' 5. In a vessel, twin propeller shafts, a turbine on each shaft, an oil engine of a power less than the total power of the turbines arranged aft of the turbines and with its shaft parallel to and between the propeller shafts, a combined toothed gear wheeI and clutch member loosely mounted on each propeller shaft, a toothed'pinion on the engine shaft directly engaging one of said toothed wheels, an intermediate pinion engaging the engine shaft pinion and the other toothed wheel, and clutch members rotating with but axially movable alon the propeller shafts adapted to be operate independently to engage the said combined gear wheel and clutch members.

Signed at London, England, this 27th daybf'April, 1911.

' JOH'N EDWARD THORNYCROFT. Witnesses C. P. LIDDON, It. F. IVILLIAMS. 

